A Date of Birth
A date of birth must be listed on SSDO for each participant.
 
NOTE When the date of birth is known at registration, it is keyed as MMDDYYYY (e.g., 06091996 for June 09, 1996). When the date of birth is unknown, it is keyed as 0701 and the approximate century (19 or 20) and year of birth (e.g., 07011995, 07012001).
 
For an unborn child, key the expected delivery date (EDD) as the date of birth (DOB).